tan2dot @tan30tan40^(@)tan80^(@)=(1)/(sqrt(3))

tan20^(@)tan40^(@)tan80^(@)

tan20^(@)tan30^(@)tan40^(@)tan80^(@)=1

tan20^(@)-tan80^(@)+sqrt(3)=

Prove that tan20^(@) tan40^(@) tan80^(@) = sqrt3

tan20^(@)tan40^(@)tan60^(@)tan80^(@)

tan20^@tan40^@tan60^@tan80^@=

tan20^(@)tan40^(@)tan60^(@)tan80^(@)=?

Without using trigonometric tables , prove that : (i) tan20^(@)tan40^(@) tan45^(@)tan50^(@)tan70^(@)=1 (ii) tan1^(@) tan2^(@)tan60^(@)tan88^(@)tan89^(@)=sqrt(3) (iii) cot5^(@)cot10^(@)cot30^(@)cot80^(@)cot85^(@)=sqrt(3) (iv) 4sin10^(@)sin20^(@)sin30^(@)sec70^(@)sec80^(@)=2

Without using trigonometric tables , prove that : (i) tan20^(@)tan40^(@) tan45^(@)tan50^(@)tan70^(@)=1 (ii) tan1^(@) tan2^(@)tan60^(@)tan88^(@)tan89^(@)=sqrt(3) (iii) cot5^(@)cot10^(@)cot30^(@)cot80^(@)cot85^(@)=sqrt(3) (iv) 4sin10^(@)sin20^(@)sin30^(@)sec70^(@)sec80^(@)=2

Show that tan20^@tan40^@tan80^@=sqrt3